Should we book taxis in advance in Barcelona?

Hi, We’ll be visiting Barcelona for the first time on our upcoming cruise. I was wondering if it’s better to book a taxi in advance to get from the train station to the cruise terminal, since there’ll be four of us. Are there enough taxis around that we won’t have to wait too long? For the return trip, same question—are there enough taxis, since we have a flight to catch? Though I doubt we’ll know in advance which terminal we’ll dock at. I came across this site below—has anyone heard of it? https://taxibarcelona.taxi/fr/

Thanks! !

hi, for the flight there are buses leaving from Plaça de Catalunya above La Rambla. Be careful, traffic is tough in Barcelona. If you take a taxi, allow extra time just in case.